Roughly 19,000 French websites have been targeted by cyberattacks since the Charlie Hebdo shooting, says the chief of France’s cyberdefense department. The attackers included some known Islamist hacking groups, says Adm. Arnaud Coustilliere, who defined the attacks as “defacement”–replacing content with political propaganda, much like CyberCaliphate did with U.S. CENTCOM’s social media accounts earlier this week.